Well, procreation rituals are quite common among organic entities, so I don't really see it as such a big deal if two characters get over-eager and embark on some steamy action ^^

Whether people want to Roleplay a celibate Paladin or a lewd, half naked barbarian, I'm okay with it; as long as they write well and cay stay in character.

As for me, I'll react like my character in that RP would, whether that be berating them for their sinful behavior, or asking if I could join, whichever would be the most fitting for the character :D